Annual report pursuant to Section 13 and 15(d)

FAIR VALUES OF ASSETS AND LIABILITIES - Fair Value Option (Details)

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FAIR VALUES OF ASSETS AND LIABILITIES - Fair Value Option (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for sale, fair value $ 652 $ 506
Loans held for investment, fair value 173 174
Long-term debt, fair value 821 0
Long-term debt, aggregate unpaid principal 16,679  
Fair Value, Recurring    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for sale, fair value 652 506
Loans held for investment, fair value 173 174
Long-term debt, fair value 821  
Long-term debt, aggregate unpaid principal 817  
Difference (4)  
Fair Value, Recurring | Loans held for sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for sale, fair value 652 506
Loans held for sale, aggregate unpaid principal 640 489
Difference 12 17
Fair Value, Recurring | Loans held for investment    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for investment, fair value 173 174
Loans held for investment, aggregate unpaid principal 184 184
Difference (11) (10)
Fair Value, Recurring | 90 or  more days | Loans held for sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for sale, fair value 0 0
Loans held for sale, aggregate unpaid principal 0 0
Difference 0 0
Fair Value, Recurring | 90 or  more days | Loans held for investment    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans held for investment, fair value 4 2
Loans held for investment, aggregate unpaid principal 4 3
Difference $ 0 $ (1)